It's an interesting proposal. But it breaks compatibility with what has been HTML since first version, by forcing to prefix existing HTML tags. Rather, it sho

It's an interesting proposal. But it breaks compatibility with what has been HTML since first version, by forcing to prefix existing HTML tags. Rather, it should propose to enhance the new semantic tags by adding a prefix, for instance <e:calendar>...</e> (or </e:calendar> for readability) while preserving existing tags.